Finding the Third Proportional to 6,921 and 10,996.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,921 : 10,996.50 = 10,996.50 : x
2. Step 2: Convert to fraction form
   6,921/10,996.50 = 10,996.50/x
3. Step 3: Cross multiply
   6,921x = 10,996.50 × 10,996.50
4. Step 4: Simplify right side
   6,921x = 120,923,012.25
5. Step 5: Solve for x
   x = 120,923,012.25/6,921
6. Step 6: Final answer
   x = 17,471.90